Caveman plugin for Grok Build

Name: Caveman
Author: JuliusBrussee

Community Claude Code plugin, installs in GrokPluginDevelopment

🪨 why use many token when few token do trick. Viral skill + proxy for coding agents that cuts 65% of tokens by talking like a caveman.

How to install Caveman in Grok Build

grok plugin install JuliusBrussee/caveman --trust

✓ Install-checked in Grok Buildchecked Oct 18, 2026

Review before you trust it. --trust lets this plugin's hooks, MCP servers and scripts run code on your computer. It's a community repo that neither xAI nor GrokStacks has reviewed, so read its code first.

We install this repo directly: Grok Build 1.0.62 can't install it through its own marketplace file. Then start a new Grok session, or press r in /plugins, to load it.

Command format: Grok Build's plugin guide

What we checked: on Oct 18, 2026 it installed with grok 1.0.62 and Grok found 23 skills, 9 slash commands, 1 subagent. That's an install check only: we haven't run it in a live Grok session.

What it contains

Skills (23)

cavecrew — When to delegate to `cavecrew-investigator` (locate code), `cavecrew-builder` (1-2 file edit) or `cavecrew-reviewer` (diff review) instead of working inline or using `Explore`. Their output is compressed, so main context lasts longer.
caveman — Terse caveman voice: answer first, fluff gone, every technical fact kept. Use for /caveman, "caveman mode", "talk like caveman", "be brief", "less tokens". Stays on until "stop caveman" or "normal mode".
caveman-commit — Write a Conventional Commits message compressed to intent only. Use for "write a commit", "commit message", /commit or /caveman-commit.
caveman-compress — Compress a memory file such as CLAUDE.md or a todo list into caveman format to save input tokens, keeping a readable backup. Sends the file's text to the configured model provider. Trigger: /caveman-compress.
caveman-discover — Find and label every LLM workflow in the repository so Caveman Cloud groups spend by workflow instead of one bucket. Use for "discover workflows" or breaking LLM spend down by workflow.
caveman-evidence-review — Read-only review of Caveman Cloud evidence: cost, Cave Score, workflows, traces, latency, errors, routing, savings. Use when asked what Caveman found or where LLM spend goes.
caveman-explore — Read-only repository explorer for cold-start orientation, broad cross-file localization, or when a direct search failed. Skip it when the exact file or symbol is already named. Returns path:line citations only; its reads stay out of main co
caveman-help — Quick-reference card for the three caveman skills and their commands. Trigger: /caveman-help or "caveman help".
caveman-learn — Act on a Caveman learn report - review the ranked token sinks, apply cost-lowering fixes with per-edit consent, and report what those fixes returned. Use when asked to lower an agent's token cost, what caveman has saved, to trim a heavy CLA
caveman-manage — Inspect Caveman Cloud's experiment lifecycle and block unsafe execution. Use when asked to start, approve, cancel, promote or roll back a Caveman experiment.
caveman-optimize — Turn a Caveman optimization observation into an operator-chosen candidate with a paired baseline evaluation. Use when asked to inspect or evaluate a Caveman optimization report. Needs explicit approval.
caveman-review — Compressed code review - one line per finding with location, problem and fix. Use for /caveman-review, "review this PR", or "review the diff".
caveman-setup — Wire a repository through the Caveman Cloud gateway so every LLM request is measured, with no behavior change. Use for "set up caveman" or adding LLM spend observability.
caveman-stats — Show recorded output and cache-read token usage and mode attribution for the current Claude Code session, or locate the host's native usage report. Trigger: /caveman-stats.
investigate-first — Diagnose ambiguous failures before editing. Use for unknown causes, intermittent behavior, performance regressions, or investigations needing evidence-ranked hypotheses.
lean-build — Build feature work with high overbuilding risk. Use for new behavior, product slices, or integrations where repository reuse, strict scope, and an explicit stop condition matter.
megacave — Caveman in Classical Chinese: 文言文 register, far fewer characters, technical terms verbatim. Invoke only with /megacave or /caveman wenyan. Stays on until "stop caveman" or "normal mode".
migration — Implement reversible compatibility-safe transitions. Use for schema, data, API, protocol, configuration, or dependency migrations requiring rollback and preservation proof.
safe-refactor — Restructure code while preserving behavior. Use for extraction, consolidation, ownership moves, or cleanup where verification must bracket structural edits.
surgical-patch — Fix bugs and small behavior changes at the narrowest responsible layer. Use when regression proof, preserved surrounding behavior, and task-relevant tests matter.
ultracave — Caveman at maximum compression: fragments, one word when one word is enough, each fact once. Invoke only with /ultracave or /caveman ultra. Stays on until "stop caveman" or "normal mode".
verify-and-stop — Prove existing work meets acceptance conditions without expanding scope. Use for validation-only tasks, completion checks, focused gate runs, and last-mile proof.
caveman-init — Drop the always-on caveman activation rule into the current repo for every IDE agent

Subagents (3)

caveman:cavecrew-builder — Surgical 1-2 file edit. Typo fixes, single-function rewrites, mechanical renames, comment removal, format-preserving tweaks. Hard refuses 3+ file scope. Returns caveman diff receipt. Use when scope is
caveman:cavecrew-investigator — Read-only code locator. Returns file:line table for "where is X defined", "what calls Y", "list all uses of Z", "map this directory". Output is caveman-compressed, one row per hit, to keep main-thread
caveman:cavecrew-reviewer — Diff/branch/file reviewer. One line per finding, severity-tagged, no praise, no scope creep. Output format `path:line: <emoji> <severity>: <problem>. <fix>.` Use for "review this PR", "review my diff"

Hooks (1)

hooks — SessionEnd, SessionStart, UserPromptSubmit

About this listing

Caveman is a community plugin on GitHub by JuliusBrussee, written as a Claude Code plugin that Grok Build installs. We install-checked it in Grok; we haven't run it in a live session or reviewed its code. When we installed it, Grok found 23 skills, 3 subagents, 1 hook. Its license is Apache-2.0. We checked commit bad48a0e1df5. It's one of 409 listings in the Development category on GrokStacks.

Caveman FAQ

How do I install Caveman in Grok Build?

Run grok plugin install JuliusBrussee/caveman --trust. We install-checked this command in Grok Build. We install this repo directly: Grok Build 1.0.62 can't install it through its own marketplace file. Then start a new Grok session, or press r in /plugins, to load it.

Is Caveman an official Grok Build plugin?

No. Caveman is a community plugin on GitHub by JuliusBrussee, not in xAI's official Grok Build marketplace. We checked that it installs and what Grok loads from it, but haven't run it in a live Grok session or reviewed its code.

What does Caveman include?

According to what Grok loaded in our install check, Caveman includes 23 skills, 3 subagents, 1 hook: cavecrew, caveman, caveman-commit, caveman-compress, caveman-discover, caveman-evidence-review….

Details

Type: Plugin
Category: Development
Source: Community Claude Code plugin, installs in Grok
License: Apache-2.0
Author: JuliusBrussee
Version: 4.0.1
Keywords: ai, anthropic, claude, claude-code, llm, meme, prompt-engineering, skill, tokens
Source repo: https://github.com/JuliusBrussee/caveman
Checked commit: bad48a0e1df5
Homepage: https://docs.caveman.so/caveman
Checked by GrokStacks: Install-checked in Grok Build on Oct 18, 2026; not run in a live session

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CavemanCommunity plugin for Grok Build · 23 skills, 3 subagents, 1 hook🪨 why use many token when few token do trick. Viral skill + proxy for coding agents that cuts 65% of tokens by talking…View on GrokStacks →

<a href="https://grokstacks.com/p/caveman/" style="display:block;max-width:380px;box-sizing:border-box;padding:14px 16px;border:1px solid #2a2e3c;border-radius:12px;background:#0a0b0f;color:#e8eaf0;font:14px/1.45 -apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;text-decoration:none"><span style="display:block;font-size:16px;font-weight:700;color:#e8eaf0">Caveman</span><span style="display:block;margin:2px 0 8px;font-size:12px;color:#9aa0b1">Community plugin for Grok Build · 23 skills, 3 subagents, 1 hook</span><span style="display:block;margin:0 0 10px;color:#c9cdd8">🪨 why use many token when few token do trick. Viral skill + proxy for coding agents that cuts 65% of tokens by talking…</span><span style="font-size:12px;font-weight:600;color:#7c9cff">View on GrokStacks →</span></a>

Markdown summary

**[Caveman on GrokStacks](https://grokstacks.com/p/caveman/)**: Community plugin for Grok Build with 23 skills, 3 subagents, 1 hook. Install: `grok plugin install JuliusBrussee/caveman --trust`

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